Abrasion type hulling machine



NOV. 18, 1952 KELLER ABRASION TYPE HULLING MACHINE Filed Oct. 29, 1949IN VEN TOR.

Bf/P/VHARO X62167? Patented Nov. 18, 1952 ABRASION TYPE HULLING MACHINEBernhard Keller, Zurich, Switzerland Application October 29, 1949,Serial No. 124,349 In Switzerland October 31, 1948 3 Claims.

The present invention refers to a dehusking machine, in particular forlegumes, having rotating grinding wheels arranged one above the otherand, surrounding said grinding wheels, a dehusking skirt with fineslots, the column of material to be dehusked moving downwardly and thehusks being exhausted through the slots provided in the dehusking skirt,the machine being characterized by having means for adjusting the speedof passage of the material to be dehusked through the machine, and meansfor slowingdown the rotational speed of said material.

Preferably the means for adjusting the speed of passage of the materialto be dehusked can be arranged below the dehusking means and be formedof a number of circular-shaped segmental slides under the operativeaction of adjustment means.

By way of example an embodiment of the present invention is describedhereafter and is shown in the accompanying drawing in which:

Fig. 1 is a vertical section through the dehusking machine,

Fig. 2 is a cross section taken along line 22 of Fig. 1,

Fig. 3 is a cross section taken along line 3-3 of Fig. 1.

The dehusking machine shown has a casing consisting of the bottom casingpart I, the top casing part I and the feed opening 2. Running axiallythrough the casing there is the shaft 3 mounted in the bearings 3', 3"and carrying at one end a driving gear wheel This gear wheel preferablyhas the shape of a bevel gear and meshes with a corresponding bevel gearI secured s to the shaft 5 driven by an electric motor 6.

I'he shaft 5 is mounted in the bearings 5, 5" in the bottom part of thecasing I to the outer wall surface thereof is attached the electricmotor 6. Equally spaced on the shaft 3 a number of grinding wheels 8inthe example shown there are arranged 5 grinding wheelswhich aresurrounded by a cylindrical dehusking skirt 9, which by way of examplecan be made of steel, and which is provided with spaced passageways orslots I0. The diameter of the grinding wheels 8 is chosen in relation tothe inside diameter of the dehusking skirt 9 in such a manner that thehusks of the material to be dehusked is ground off between the grindingwheels and the dehusking skirt 8 on rotation of said grinding wheels 8.During this operation the husks are exhausted and removed in thedirection of the arrow PI through the slots ID of the dehusking skirt bymeans of the fan I3 mounted on the lower end of shaft 3, and thedehusked material is led to a central outlet chute I I in the direction7 of the arrow P2.

To prevent accumulation of the material dehusked in the outlet chute IImeans for adjusting the speed of passage of said dehusked material areprovided. According to the example of embodiment shown said means arearranged below the dehusking means 8 and consist of an obstructionformed of the slides I2 which adjustably close more or less the mouth ofthe outlet chute II in the casing top part I. The slides l2 take theform of circular-shaped segments and are under the operative action ofthe adjusting means I4. The slides I2 are adjustable independently ofeach other.

To counteract the detrimental efi'ect of the high circumferential speedsof the dehusking means 8 necessary for the dehusking operation atwhichspeeds the grains would be carried along and flung against thedehusking skirt 9 where they would be damaged the dehusking machine isprovided with means for slowing down the material to be dehusked duringits treatment. Said means according to the first example of embodimentshown in Fig. 1 can consist of combshaped slowing-down elements I5extending between the grinding wheels 8 and the dehusking skirt 9 in thevertical position and being adjustably arranged in relation to thedehusking elements. The projecting comb-teeth of the slowing-downelements engage between the grinding wheels arranged one above the otherand prevent the material to be dehusked from being carried along by therotation of said grinding wheels. Said slowing-down elements l5 aremounted for adjustment in the radial direction by means of the slots I6.

The dehusking machine described is suitable for the dehusking of legumesor vegetables of any suitable kind such as peas, beans, grain. It hasthe advantage that both the circumferential as well as thepassing-through speeds of the material to be dehusked can be adjusted sothat undesired accumulations can be prevented and a continuous operationwith a simultaneous greatest possible preservation of the materialdehusked is achieved.

It can thus be seen that there has been provided, in accordance with thepresent invention, a hulling machine, in particular for grain and likeleguminous material, comprising a substantially vertical shaft,rotatable abrasive wheels spacedly arranged from each other on saidshaft,

' a skirt surrounding said wheels and. provided within said channel forreducing the rotational, speed of said material caused by said abrasiyewheels, said member having portions extending within the spaces betweensaid abrasive wheels; v and between said skirt and said abra ve wheels 7and in radial direction from said-skirt;

What I claim and wish to secure by liett'ers Patent is: 1. A hullingmachine, in particular for grain ndhke uminq s materia om r sing a. sub;stantially e ca sha t o atabl abra i w ee sp'acedlyarrang'ed from eachothergo'ni, id 8 aft,

the l ection f aidha t l nisf e i en 1 e 1 ndz ne on ct w th aid bra i ewhee s; m an for.1'egu1 ating. the speed of passage of said fed mater l.h. said; chann bi e ie i t meansv ompri ing, embe ex ending. opsi- 4tudinally of the axis of said shaft and located within said channel forreducing the rotational speed of said material caused by said abrasivewheels, said member having portions extending within the spaces betweensaid abrasive wheels and between said skirt and said abrasive wheels andin radial direction from said skirt.

2. A machine according to claim 1, wherein saidregulating means comprisea plurality of circularshaped segmental sIideseXtending at one end ofsaid passageway, and means outside said skirt and associated with arespective slide for adjusting the same in radial direction to saidshaft."

3.. A machine according to claim 1, including means for adjusting saidprojecting means in position 'relati-vely to the periphery of saidabrasive" wheels and within the spaces between said abrasiye wheels.

BERNHARD KELLER.

eEri qEsQ rEa The follawing e rences are, of. record in the; l v s li i9 9???- VI r I i I UNI EEERS PATES PATENTS umber Name te ie sg'z, Wall tal. Mar. 30,1375 24:2 ;153; Prinz; May 3-1, 1881 2YZ4 -,0' 02' MarLlB,1883 3,93, 5 38 Feb. 26, 1839; 439,435 0 11;. 28, 1890'" 999; 112 35July 25; 1911 1,017,312 6 1912

